Pneumatic tire.



I BARROW PNEUMATIC TIRE. APPLICATION FILED NOV: 9, 49M.

. Patented July 4,1916.

. it is desired to replace the liner after it has BERNARD BABBOW, 0F BARBOWS STORE. VIRGINIA.

PNEUMATIC TIRE.

1,1 seem.

Specification of Letters Patent.

Patented July a, 1916.

Application filed November 9, 1914. Serial No. 871,151.

To all whom it may concern:

Be it known that I, BERNARD BARR W, a citizen of the United States, residing at Barrows Store, in the county of Brunswick, State of Virginia, have invented certain new and useful Improvements in Pneumatic tempts have been heretofore made to provide inner liners for the shoes of pneumatic tires but these liners, while they have been more or less successful, have not been entirely satisfactory du to certain inherent faults. For instance liners have ben provided which are made of rubber, fabric or other suitable material and which in use have been placed between the inner tube andthe shoe. These liners of which I speak do not extend completely around the shoe but only for a portion of the distance and are so placed within the shoe that they overlie the inner tube at a point where the shoe is either worn completely through or is weak. lVhile the liners of this type are successful in preventing blow-outs when they are new there is a tendency for the said liners to creep so as to leave the hole in the shoe uncovered. Furthermore the constant pressure caused by the air in the inner tube tends to force the liner out through the hole or weak portion in the shoe and thus increases the size of the hole. This is because of the fact that the liner does not extend completely around the shoe. There has been another type of liner used which consists of a strip of material extending completely around the inner tube and located between the inner tube and the shoe. The edges of this liner are brought togetherand are located between the edges of the shoe. \Vhile this type of liner has been used to a certain extent it. too. has certain disadvantages. For instance after it has been used for a short time it becomes wrinkled and the edges become upset so that when once been removed it is exceedingly dillicult to do so. and especially so that it will lie cutirclv flat within the-casing and so that it will not injure the tube. This upsetting of the edges of the linen-is caused, to a great extent, by the tendency of the liner to creep, which results 111 the pulling and stretching of the liner at points. Inasmuch as these liners are objectionable for the above noted reasons they must be replaced from time to time and consequently the cost of maintenance will be great, even as is the initial cost. It is an object of the invention to provide a tire which includes a liner which will neither creep nor permit the inner tube to blow-out through a hole or weak portion in the shoe and in obtaining these results I employ a liner which neither covers only a portion of the tube adjacent a worn out or weak portion of the-shoe nor is provided with single thickness edges but I do employ one which covers the .entire inner tube and is provided with reinforced edges which act not only to prevent the upsetting of the edges but also to prevent the creeping of the liner. In constructing .a tire in accordance with my invention I employ a shoe which has weak portions or holes therein and a similar liner of substantially the same diameter. In constructing the said tire I first cut notches in the edges of the liner. insert the inner tube therein, and then roll the liner until the edges overlap. I, then bind the liner in this rolled condition by means of ligatures and insert the liner into the shoe The shoe is then placed upon the rim of a wheel in the usual manner and the inner tube inflated. In assembling the liner and shoe I take particular care in arranging, them so that the weak portions of one register with relatively stronger portions of the other In the drawings: Figure 1 is a sectional perspective view of a tire constructed in accordance with my irention showing the positions of the parts when the inner tube is inflated; Fig. 2 is a fragmental perspective view of the liner showing the notches cut therein, and Fig. 3 is a sectional perspective view of the liner when it is rolled and bound by the ligatii -"s and before the inner tube has been inflated.

Referring to the drawing by reference characters wherein like parts are indicated by like characters throughout the several -views: In the embodiment of the invention shown in the drawing. I have illustrated the tire shoe 1 which is provided with heads 2 on its edges so that it may be secured to the rim 3 of the wheel. Located within this shoe 1 is a liner 4 which is of substantially the same normal shape as the shoe 1. An

against the rim 3. It' is of course obvious that theshoe will become weak and worn at 1 on the other edge of the liner is passed in Wardly and beyond the edge on which the head 6 is located as clearly illustrated in 173 1 f the drawing. Notehes 7 are cut in" within the shoe and which will further registration and are adapted to permit the valve stem of the inner tube to pass therethrough. It will be noted that therubber an opening as disclosed at 8 in Fig. 1.

- It will be noted that-the-pressure caused by the inner tube will bind the bead 6 be-- and if it .Were not for the presence of the .7

faceof the liner contacts with the inner fabncface of the shoe 1 and it has been found by actu a1 enpcmence that this particular arrangement causes the rubber on the,

liner to gum so that it virtually forms a 0e inent which secures the liner to the shoe.

This is particularly advantageous in that it will prevent the entry of dirt and moisture} between the liner and'the shoe through such tween the beads 2 on the shoeand also bind the bead 6 on theopposite edge of the liner against the inner face thereof. This will, 1 prevent the creeping'of the liner within the shoe. It will be further noted that the liner is so arranged that a continuous smooth sur face is provided against which surfacethe inner tube bears. It is to be noted that the presence of the' heads 6 and 6 on the liner will effectively prevent blow-outs where the shoe becomes weak or worn because of the pressure the point where it contacts with the rim 3 beads 6 and 6 the pressure within the tire would cause the edges of the liner to blow v out through the weak or worn portions of the shoe. On the other hand the presence of these beads efi'ectively prevents any blow- :-.-..45 out the liner and consequently of the in ner tube through any weak or worn portion oftheishoeat points adjacent'to the rim or even at points remote from the rim.-

From the foregoing description 'it'will be seen. that I' have provided a fire which ineludes an inner liner which? will effectively prevent blow-outs through, the, weak p'ortions of the shoe and which will not creep has. merely .be'en for the sake of convenience and I do not wish to be limited to thatpar- .jticular embodiment I as it is obvious that numerous changes may be madein the de- "ftails of construction ,without departing from-th e spirit of the invention or exceed ing the scope of the appended claims. WhatjI claim is:-. 1

1 'LiIn" a pneumatic tire, the combination with ajshoe adapted to'have its edges attachedto a rim, of a liner having beads on the edges thereof, one of said beads being ing beads on the edges thereof, one of which beadsis disposed between the edges of the shoe and the-other airmen beads. is dis posed above thefirst mentioned ,bead and in an inner tube disposed within the'liner.

In testimony whereof,- I ailix my"'sign l ture, in the presence of two Witnesses. -BERNARD BARROW.

' Vl itnesses fzy j i D. A.'1Monn1s, JAs. BLAoKwoon.-'

disposed between the edges of the shoe and xcontact withthe inner face of 'the liner, and 

